Picture frame



FIG. 1 is a rear perspective view of a picture frame showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, the side opposite being a mirror image;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a rear perspective view of a modified form of the design shown in FIGS. 1 through 6;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a right side elevational view thereof, the side opposite being substantially a mirror image;

FIG. 10 is a bottom plan view thereof;

and

FIG. 11 is a top plan view thereof. 

The ornamental design for a picture frame, as shown and described. 